mindmap root((思考)) think is general and may apply to any mental activity, but used alone it often suggests the attainment of clear ideas or conclusions: a course that really teaches you to ~. cogitate implies a deep or intent thinking: quietly sitting and ~ing. reflect suggests the unhurried consideration of something called or recalled to the mind: ~ed on fifty years of married life. reason stresses a consecutive logical thinking: ~ed that the murderer and victim knew each other. speculate implies a reasoning about things that are theoretical or problematic: historians have ~d about the fate of the Lost Colony. deliberate suggests a slow or careful reasoning and consideration before forming an opinion or idea or reaching a conclusion or decision: the jury ~d for five hours.